Enamel cover on-line forming equipment

Abstract

The invention discloses enamelling on-line forming equipment which comprises a pay-off device, a pre-drawing device, a horizontal two-roller mill, a measuring device and a finish drawing device. The pay-off device comprises an upper lifting pay-off rack and a pay-off wheel; a pre-stretching device is arranged behind the pay-off device along the advancing direction of the copper wire, and comprises a round die puller, a round die puller tension wheel group and a guide wheel; the pre-stretching device passes through a horizontal two-roller mill after wire outgoing, and a measuring device and a rolling tension wheel are arranged behind the horizontal two-roller mill; a copper round wire is rolled into a rectangular flat wire by the horizontal two-roller mill, and then the rectangular flat wire is subjected to two-pass finish broaching by the finish broaching device, and the finish broaching device comprises a first finish broaching structure and a second finish broaching structure. The forming equipment is provided with the pre-stretching device, the rolling mill and the finish broaching device, and is used for carrying out continuous plastic processing (pre-stretching, rolling and two times of finish broaching) on the copper round wire, so that online forming of the enameled flat wire is realized, the production process is shortened, and the production efficiency is improved. The device is installed in front of the enameling machine, and automatic linkage production with the enameling machine is realized.

Description

Technical Field

[0001] The present invention relates to an enamelled wire production device, and more particularly to an on-line enamelling forming device. Background Art

[0002] The traditional production process of enamelled rectangular wire usually adopts an off-line forming method, that is, first processing copper round wire into rectangular flat wire and then performing enamelling treatment. This method has the following disadvantages:

[0003] 1. Long production process and low efficiency. Off-line forming requires independent equipment and processes, resulting in a lengthened production process and low efficiency.

[0004] 2. Stress concentration is likely to occur during the off-line forming process, affecting the mechanical and electrical properties of the flat wire. During the off-line forming process, the copper wire needs to be transported and processed multiple times, which is likely to cause stress concentration and lead to a decline in the mechanical and electrical properties of the flat wire.

[0005] 3. Stress concentration problem: During the off-line processing, the copper wire undergoes multiple cold work hardenings, resulting in internal lattice distortion, and the resistivity increases by 5% - 10%, affecting the electrical properties of the enamelled wire.

[0006] 4. It is difficult to achieve automated linkage production with an enamelling machine. There is a lack of an effective linkage mechanism between the off-line forming device and the enamelling machine, making it difficult to achieve automated production and affecting production efficiency and product quality.

[0007] 5. Additional equipment and site are required, and the investment cost is high. The off-line forming device occupies a large area and has a high investment cost, increasing the production cost of the enterprise. Summary of the Invention

[0008] To solve the problems of a long production process and stress concentration affecting the properties of the enamelled wire, the present invention provides an on-line enamelling forming device that can produce efficiently, continuously, and stably and can be automatically linked with an enamelling machine.

[0009] The present invention provides the following technical solutions:

[0010] The on-line enamelling forming device includes a wire pay-off device, a pre-tensioning device, a horizontal two-roll mill, a measuring device, and a finishing drawing device;

[0011] The wire pay-off device includes an upper lifting wire pay-off rack and a wire pay-off wheel;

[0012] The pre-tensioning device is arranged along the direction of the copper wire travel behind the wire pay-off device. The pre-tensioning device includes a circular die draw, a circular die draw tension wheel set, and a guide wheel. A guide wheel is arranged in the incoming wire direction of the circular die draw, and a circular die draw tension wheel set is arranged at the rear side above the guide wheel;

[0013] After the wire exits the pre-drawing device, it passes through a horizontal two-roll rolling mill, and a measuring device and a rolling tension wheel are arranged behind the horizontal two-roll rolling mill.

[0014] The horizontal two-roll rolling mill rolls the copper round wire into a rectangular flat wire and then undergoes two passes of fine drawing through a fine drawing device. The fine drawing device includes a first fine drawing structure and a second fine drawing structure, and a transition guide wheel is arranged between the first fine drawing structure and the second fine drawing structure.

[0015] Further, the first fine drawing structure includes a first flat die drawing and a flat die drawing tension wheel, and the flat die drawing tension wheel is horizontally arranged adjacent to the wire outlet position of the first flat die drawing.

[0016] Further, the second fine drawing structure includes a second flat die drawing and an outlet tension wheel, and the outlet tension wheel is arranged downward adjacent to the wire outlet position of the second flat die drawing.

[0017] Further, the horizontal two-roll rolling mill has an upper roll and a lower roll.

[0018] Further, the equipment is also provided with a rolling cooling water tank and a wire drawing cooling water tank.

[0019] Further, the equipment also includes a tension sensor, a controller, and motors for each station.

[0020] The tension sensor is used to monitor the position change of the tension wheel in real time during the processing of each pass.

[0021] The controller receives the signal from the tension sensor and calculates and adjusts the speed according to the preset tension value.

[0022] The motors for each station accurately adjust the tension according to the instructions of the controller, and the motors for each station feedback the adjusted tension information to the controller through a feedback loop to form a closed-loop control.

[0023] Further, the equipment is installed in front of an enameling machine and uses industrial Ethernet communication technology to realize automated linkage production with the enameling machine.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. This forming equipment has a pre-drawing device, a rolling mill, and a fine drawing device, which are used for continuous plastic processing of copper round wire through (pre-drawing → rolling → 2 passes of fine drawing) to realize the on-line forming of enamelled flat wire, shorten the production process, and improve production efficiency. Integrating the forming process into the enamelling production line eliminates the intermediate link of off-line forming and significantly improves production efficiency.

[0026] 2. The online forming process is beneficial to improving the mechanical and electrical properties of the flat wire. During the online forming process, the copper wire is in a continuous processing state, avoiding stress concentration, which is beneficial to improving the mechanical and electrical properties of the flat wire;

[0027] 3. This equipment is installed in front of the enameling machine to achieve automated linkage production with the enameling machine, improving production efficiency and product quality stability. It realizes seamless docking with the enameling machine to ensure the continuity and stability of the production process, and improves production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the present invention;

[0029] Figure 2 It is a top view of the present invention;

[0030] Figure 3 It is an enlarged schematic diagram of the horizontal two-roll rolling mill of the present invention;

[0031] Figure 4 It is a control schematic diagram of the present invention.

[0032] In the figure: 1. Upper lifting wire pay-off stand; 2. Round die drawing; 3. Round die drawing tension pulley group; 4. Horizontal two-roll rolling mill, 41. Upper roll, 42. Lower roll; 5. Measuring device; 6. Rolling tension pulley; 7. First flat die drawing; 8. Flat die drawing tension pulley; 9. Second flat die drawing; 10. Outlet tension pulley; 11. Electric control cabinet; 12. Control panel; 13. Rolling cooling water tank; 14. Wire drawing cooling water tank; 15. Wire pay-off wheel; 16. Guide pulley; 17. Bracket; 18. Transition guide pulley. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-3 , an enameling online forming device of the present invention includes a wire pay-off device, a pre-drawing device, a horizontal two-roll rolling mill 4, a measuring device 5, a fine drawing device, an electric control cabinet 11 and a control panel 12; the wire pay-off device includes an upper lifting wire pay-off stand 1 and a wire pay-off wheel 15, and the upper lifting wire pay-off stand 1 and the wire pay-off wheel 15 are fixed on the top of the bracket 17;

[0035] A pre-tensioning device is arranged behind the wire pay-off device along the traveling direction of the copper wire. The pre-tensioning device includes a circular die draw 2, a circular die draw tension pulley group 3, and a guide pulley 16. A guide pulley 16 is arranged in the incoming wire direction of the circular die draw 2, and a circular die draw tension pulley group 3 is arranged at the rear side above the guide pulley 16;

[0036] After the wire exits the pre-tensioning device, it passes through a horizontal two-roll rolling mill 4. The horizontal two-roll rolling mill 4 has an upper roll 41 and a lower roll 42. A measuring device 5 and a rolling tension pulley 6 are arranged behind the horizontal two-roll rolling mill 4;

[0037] The horizontal two-roll rolling mill 4 rolls the copper round wire into a rectangular flat wire and then undergoes two passes of fine drawing by a fine drawing device. The fine drawing device includes a first fine drawing structure and a second fine drawing structure, and a transition guide pulley 18 is arranged between the first fine drawing structure and the second fine drawing structure.

[0038] The first fine drawing structure includes a first flat die draw 7 and a flat die draw tension pulley 8. The flat die draw tension pulley 8 is horizontally arranged adjacent to the outgoing wire position of the first flat die draw 7.

[0039] The second fine drawing structure includes a second flat die draw 9 and an outgoing wire tension pulley 10. The outgoing wire tension pulley 10 is arranged downward adjacent to the outgoing wire position of the second flat die draw 9.

[0040] The equipment is also provided with a rolling cooling water tank 13 and a wire drawing cooling water tank 14.

[0041] The equipment adopts a modular design and proceeds in sequence along the traveling direction of the copper wire:

[0042] Wire pay-off → Pre-tensioning → Rolling → Fine drawing → Tension control → On-line detection → Interlocking control → Pay-off transition.

[0043] Wire pay-off: Adopt the upward lifting passive wire pay-off method to achieve constant-tension wire pay-off of the copper round wire, preventing wire breakage and deformation.

[0044] Pre-tensioning: Adopt a circular die draw and tension pulleys to pre-stretch the copper round wire, improve its mechanical properties, and enhance the quality of subsequent processing.

[0045] Rolling: Adopt a one-pass rolling process, equipped with high-precision rolling rolls, roll the copper round wire into a rectangular flat wire, and adjust the rolling parameters in real time to ensure the dimensional accuracy and surface quality of the flat wire.

[0046] Fine drawing (2 passes): Adopt the first fine drawing structure and the second fine drawing structure to fine-draw the rolled flat wire, further improve its dimensional accuracy and surface finish, and meet the requirements of the enameling process.

[0047] Tension control: Adopt closed-loop control technology to monitor the tension changes in the processing of each pass in real time and make precise adjustments through a servo motor to prevent wire breakage and deformation and ensure the stability of the production process.

[0048] Figure 4 As shown, multiple tension wheels are installed in this device. By installing tension sensors, the tension change can be monitored.

[0049] 1. Tension sensor: Used to monitor the position change of the tension wheel in real time during the processing of each pass;

[0050] 2. Controller: Receives the signal from the tension sensor and calculates and adjusts the speed according to the preset tension value;

[0051] 3. Motors at each station: Precisely adjust the tension according to the instructions of the controller to prevent wire breakage and deformation;

[0052] 4. Feedback loop: Feeds back the adjusted tension information to the controller to form a closed-loop control.

[0053] Online detection: Equipped with a high-precision laser diameter gauge and a surface defect detector to perform online detection on the dimensions, roundness, surface defects, etc. of the flat wire, and feed back the detection results to the control system to achieve real-time monitoring of product quality.

[0054] Linkage control: Adopts industrial Ethernet communication technology to perform data interaction with the enameling machine to achieve linkage functions such as speed synchronization, tension matching, and fault alarm, ensuring the continuity and stability of the production process.

[0055] 1. Synchronous control of the speeds of the front and rear motors inside the device

[0056] The outgoing wire speed (S4) of the 4th station is used as the main speed inside this device;

[0057] The outgoing wire speed (S3) of the 3rd station = S4 * linkage ratio (P3) of the 3rd station + tension compensation (B3) of the 3rd station;

[0058] The outgoing wire speed (S2) of the 2nd station = S3 * linkage ratio (P2) of the 2nd station + tension compensation (B2) of the 3rd station;

[0059] The outgoing wire speed (S2) of the 1st station = S2 * linkage ratio (P1) of the 1st station + tension compensation (B1) of the 3rd station;

[0060] The 1st station is at the round die draw 2, the 2nd station is at the horizontal two-roll rolling mill 4, the 3rd station is at the first flat die draw 7, and the 4th station is at the second flat die draw 9.

[0061] 2. Speed matching control of the upper and lower rolls of the two-roll rolling mill

[0062] The upper and lower rolls use servo motors, and the speed is precisely controlled through servo encoders;

[0063] The motors of the upper and lower rolls adopt master-slave control, and the output power is balanced.

[0064] 3. The wire outlet wheel is speed-matched with the previous equipment

[0065] The wire outlet speed at the 4th station (S4) = the maximum designed speed of the whole machine (S5) * the percentage of the current position of the tension wheel (B)

[0066] An enameling on-line forming device of the present invention is installed in front of an enameling machine and is used for continuously plastically processing copper round wires through (drawing - rolling - drawing - drawing) to process them into flat wires with a rectangular cross-section, and realizing full-automatic speed synchronization, tension matching and process parameter linkage with the enameling machine to form an integrated production line.

[0067] This on-line forming device is compact in structure and small in floor area, without the need for additional equipment and sites, reducing equipment and site investment, and effectively reducing the production cost of enterprises.

[0068] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Enamel online forming equipment, characterized by: It comprises a wire-releasing device, a pre-drawing device, a horizontal two-roller rolling mill (4), a measuring device (5) and a finishing drawing device; The pay-off device comprises an upper lifting pay-off frame (1) and a pay-off wheel (15); A pre-tensioning device is arranged behind the wire-releasing device along the traveling direction of the copper wire, and the pre-tensioning device comprises a round die puller (2), a round die puller tension wheel group (3) and a guide wheel (16). The round die puller (2) is provided with a guide wheel (16) in the wire feeding direction, and a round die puller tension wheel group (3) is arranged above and behind the guide wheel (16); The wire from the pre-tensioning device passes through a horizontal two-roller rolling mill (4), and a measuring device (5) and a rolling tension wheel (6) are arranged behind the horizontal two-roller rolling mill (4); The horizontal two-roller rolling mill (4) rolls the copper round wire into a rectangular flat wire and then passes it through two finishing draws by a finishing device. The finishing device comprises a first finishing draw structure and a second finishing draw structure. A transition guide wheel (18) is arranged between the first finishing draw structure and the second finishing draw structure.

2. The enameled online forming equipment according to claim 1 is characterized in that: The first fine drawing structure comprises a first flat die drawer (7) and a flat die drawer tension wheel (8), and the flat die drawer tension wheel (8) is horizontally arranged close to the wire outlet position of the first flat die drawer (7).

3. The enameled online forming equipment according to claim 1 is characterized in that: The second fine drawing structure comprises a second flat die drawer (9) and a wire outlet tension wheel (10), wherein the wire outlet tension wheel (10) is arranged downwardly and adjacent to the wire outlet position of the second flat die drawer (9).

4. The enameled online forming equipment according to claim 1 is characterized in that: The horizontal two-roll rolling mill (4) has an upper roll (41) and a lower roll (42).

5. The enameled online forming equipment according to claim 1 is characterized in that: The equipment is also provided with a rolling cooling water tank (13) and a wire drawing cooling water tank (14).

6. The enameled online forming equipment according to claim 1 is characterized in that: The equipment also includes tension sensors, controllers and motors for each station. Tension sensor, used to monitor the position change of the tension wheel in real time during each processing; A controller receives signals from the tension sensor and calculates and adjusts the speed according to a preset tension value; Each station motor accurately adjusts the tension according to the instructions of the controller, and each station motor feeds back the adjusted tension information to the controller through a feedback loop to form a closed-loop control.

7. The enameled online forming equipment according to claim 1 is characterized in that: The equipment is installed in front of the enameling machine and adopts industrial Ethernet communication technology to realize automated linkage production with the enameling machine.

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